command line tool to manage email (alias-)domains/accounts/aliases …
vmm is the easy to use and configurable command line tool for administrators and postmasters, to manage domains, alias-domains, accounts and relocated mail users. It allows the fast and easy management of mail servers.
vmm is written in Python. It's designed for installations using Dovecot and Postfix with a PostgreSQL backend.
DictDefence is program written in Python to stop dictionary attacks of all sorts. The basic idea behind DictDefence is the automated blocking of Script Kiddies that run dictionary based attacks on your servers.